Improvement in breech-loading fire-arms



R. F. COOK.

Breech-loading Fire-arm- Witnesses;

/y/j/L/r/V Inventor:

ER. WASHINGTON, D c.

Patented July 24, 1.860.

UNITED STATES PATENT OFFICE.

ROSSWELL F. COOK, OF POTSDAM, ASSIGNOR TO HIMSELF AND FRANK G. JOHNSON,BROOKLYN, AND M. J. WHITMORE, OF POTSDAM, NEW YORK.

IMPROVEMENT IN BR'EECH-LOADING FIRE-ARMS.

Specification forming part of Letters Patent N0. 29,3110, dated July24,1860.

To a/ZZ whom it may concern.:

Beit known that I, R. F. Cook, of Potsdam, inthe county of St. Lawrenceand State of New York, have invented a new land useful Mode ofConstructing Breech-Loading Fire-Arms; and I do hereby declare that thefollowing is a full and exact description thereof, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, making a part of this specification, in which- Figure l is aperspective view; Fig. 2, a longitudinal section; Figs. 3 and 4,transverse sections.

It is well understood that breech-loading rearms, after being used forawhile, are quite liable to produce windage or leakage at the attachmentof the barrel to the stock or breech.

'Io overcome this serious objection to this otherwise desirable class offire-arms constitutes the object of my invention, the nature of whichconsists in providing such. an adjustable attachment of the barrel A ofthe pistol to the stock or breech B as to render it possible and easy tokeep the barrel always tightly tted and rmly held to the stock orbreech, however much the contactsurfaces may wear away by use.

The operation of my invention is described as follows:

A represents the barrel; B, the stock or breech; C and D, theface-plates covering the lock; E, the caliber at breech; F, the post orstem passing from the barrel through the iron stock or breech-frame B B,and on which the barrel revolves; G g, the nut on the stem F, g (prime)being a prolongation of the nut on the lower side; H, a small screwpassing through and working in the face-plate C.

In Fig. 2 the stock and barrel are in position with each other forfiring or discharging the load. In order to load the gun, the barrel isrevolved on the stem F until the caliber E is brought in view, as seenin Fig. 3.' This revolution carries the prolongation of the nut G fromthe point ofthe screw H to the point D of the plate D, which arrests themotion of the nut, allowing the barrel, as it is further revolved, tobecome somewhat liberated fromthe f stock or breech by partially turningthe stem F out of the nut G. No w, as the barrel is revolved back to thering-position, the point g of the nut G coming in contact with the screwH, while the barrelL is still being revolged onto its proper position,has the effect to screw the stem F into the nut'G, and thus produceavery tight and binding t or attachment of the two contact-surfacesbetween the barrel and stock or breech.

By referring to Fig. 4 it will -be seen that the nut G will be furtherturned onto the post F by turning up the screw H, while if this screw Hbe turned back or out to any extent it has the effect of allowing thenut G to be turned partially off of the post F. Hence by means of thesmall screw H any degree of closeness or tightness can be producedbetween the contact-surfaces. As these contactsurfaces can be nicelytted and held together by other modes of attachment while the gun is newor not much used, the chief or principal object of the screw H is to acton the prolonged nut G for the purpose of tightening or drawing up intoclose contact the two surfaces as from time to time it may becomenecessary by the wearing away of the said surfaces by use.

Of course I do not confine the application of my invention to the pistolor any other particular style of iire-arms, but intend to have it applyto all kinds of breech-loading guns.

What I claim, therefore, as my invention, and

desire to secure by Letters Patent of the United The combination of theprolonged nut G with tl'escrew H, or their equivalents, acting upon eachother, substantially in the manner and for the purposes herein setforth.

ROSWELL F. COOK.

Witnesses:

A. X. PARKER, WILSON HOPKINS.

